US1113442A - Punching and riveting machine. - Google Patents

Description

L.- A. IRVI'N.

PUNGHING AND'RIVBTING MACHINE. APPLIOATION FILED JUNE 17, 1912.

Patented Oct. 13, 1914.

2 SHEETS- 'SHEET 1.

laden/Z05. s/la A [#1 612 L. 'A. IRVIN- PUNUHING AND RIVETING MACHINE.

APPLICATION FILED JUNE 17, 1912.

1, 1 1 3,442. 1 Patented 001;. 13, 19-14.

2 SHEETSSHEET 2.

Les/5e14- lldl n nnrrnn s'rarns PATENT oFFioE.

LESLIE A. IRVIN, OF LOS ANGELES, CALIFORNIA, ASSIGNGR 1J0 BAKER IRON WORKS, DE LOS ANGELES, CALIFQRNIA, A CGR'EORATIUN OF CALIFORNIA.

PUNCHING AND BIVE'LING MACHINE.

Specification oi Lott :s Patent. Application filed June 1?, 1912.

tion is to insure this as well as to minimize wear and consequent looseness ofthe tool-. holding plunger-s, and provision of means to yieldingly hold the tools out of operative position so that the tool performing the work is the only tool which strikes the casing while such tool is in operation.

Otherobjects are, cheapness and simplicity in construction and ease and simplicity of operation throughout the process of making sheet metalpipe and especially the well casing referred to.

In machines of this character heretofore invented the work-supporting means in the form of a sleeve has been operated by fluid pressure means employing act on opposite sides of said sleeve, thereby subjecting the sleeve to liability of cramping and binding on the anvil or post which the sleeve surrounds; wherefore I do not broadly claim fluid pressure means to cushion the work-supporting means, but it. is particularly pointed out that an object of this invention is to avoid all liability of cramping and binding and at the same time retain simplicity of construction, and this is accomplished by'the provision of a single piston or plunger forming at one end thereof the work'supporting means. More specifically stated I employ a work-supporting plunger having a slot in one end, and an an vil projecting through said slot and having its projecting ends seated in the stake.

The invention may be variously embodied and includes the complete machine and various parts and combinations of parts set forth in the subjoined detail description.

The accompanying drawings illustrate the invention.

.Figure lis a side elevation of a machine constructed in accordance with this invention, the punch being shown in operative position. 2 is an enlarged fragmental sectional elevation on line 03 Fig. 5 of the working end of the machine with rivet set in operative position and a piece of work shown supported by the work supporter. Fig.3 is an axial sectional detail of the work supporter detached with cross-section of anvil in place. .Fig. i is a plan of the riveting anvil and \work supporter in the stake, a fragment of wh'ch is shown. Fig. 5 is an elevation partly in section of the working 1 end of the machineviewed from the left of To all whom it may concern Be it known that I, LESLIE A. lawn a citizen. of the United States, residing at Los Angeles, in the county of Los Angelcs and State of California, have invented new and useful Improvements in Punching and Riveting Machines, of which the following is a specification.

. This invention includes mechanism for riveting sheet material together, as for instance, in the manufacture of sheet metal pipe.

in southern California, oil wells are drilled to great depths and it is customary to case the walls thereof where the same are liable to cave in, with what is termed stovepipe casing, the same being made of two thicknesses of sheet metal pipe joints telescoped together in staggered relation, the outer and inner thicknesses being fastened together by rivets.

It is often desirable to case a well to great depth and the stove-pipe casing is liable to pull apart by reason of its own weight shearing the rivets; and it has become a common expedient to dent the easing with hand picks so that in addition to the usual rivets, the sheet metal thus dented, or picked as it is termed, will assist in holding the joints together.

Anobject of this invention is to provide superior means for setting rivets whereby the sheets may be tightly held together and I the rivet head tightly held against the sheet with which it is to contact and the rivet held in true position in such a manner as to avoid any liabilityof canting or distorting the rivet in theriveting operation, thus producing a rivet fastening of maximum strength; and to also provide simple, convenient and eii'ective means for picking the casing at the time of its manufacture,

i-inother object is to accomplish the foregoing objects by mechanism in connection with a stake that is to be used with automatic tools for punching, riveting and picking; an object being to make provision whereby the stake is well fitted for all of the operations; parts of the machine in connection with the stake being adjustable into and out of operative positions.

In machines of this character it is especially desirable to maintain a slear View of that portionof the casing which is directly under the tool and an object of this inventwo pistons which I this is effected by the F 1 and 2; p rts being in section on line indicated at Fig. 2, and in the position shown in F 2. Fig. 6 is a s-ctional elevation of the rivet-setting apparatus at the close of the rivet-driving stroke. '7 is an enlarged sectional elevation of the picking apparatus at the close of the picking stroke. Fig. 8 is a fragmental plan, partly in section illustratii'ig the mechanism shifting the tools into and out of operative position.

The views are in various scales for economy of space and convenience of iilustration.

The machine comprises a punch frame having a standard 1 and an overhanging arm 2, and a stake 3 fixed to said standard and extending underneath the arm. Said stake is provided along the top side with a. series of die seats 1, 5, 6 in which are respectively seated the punching die 7, picking die 8 and riveting die or anvil 9. Above said dies and supported by the arm 2 is mounted the usual reciprocating head 10 by which is carried the series of tools 11, 12, 13, said tools being complementary to the dies 7, 8 and 9 respectively. Means in the form of spiral springs 1 1 are provided to yieldingly hold the tools out of operative position; said springs being seated on the bottoms of vertical ways 15 bored in a holder 16 that is fixed by cap screws 17 to the head 10, and practically forms a part of said head. Said springs act on the under sides of shoulders 18 at the upper ends of the toolholding plungers 19 that are provided at their lower ends with thread-ed tips 20 011 which are screwed the usual clamping nuts 21 which hold the heads 22 of the tools 11, 12 and 13 in place, respectively. The plungers are provided at their upper ends with square heads 23 that reciprocate in the channel 2% provided in the upper end of the holder 16 to accommodate said heads and a gag slide 25 that has a. wedge-like tooth 26 to actas a gag upon the heads 23 to depress the plungers respectively until the head so depressed rests upon the bottom of the channel at the low-est limit of the movement of its plunger, thus holding the tool in operative position to coact with its die when the head is bodily depressed. This construction is important for the reason that the square heads act as guides in the channel 2% which they fit, thus preventing looseness and especially preventing the plungers 19 from tur ing so that when said plungers are equipped with lap-laying tools, or the like, such as shown, for instance, in Patent No. 1,044,813 to Pennypacker, dated November 19, 1912, said tools will be prevented from turning relative to the dies. This construction also facilitates attaching and detaching the tools from the plungers.

The heads 28 have beveled faces 27 to receive the beveled face of the wedge-like tooth 26 and when the tooth is centrally above the head of any plunger said head is f=r rced against the bottom of the tool-holder, thereby holding the tool of such plunger in operative position. When the wedge is withdrawn from engagement with the head of any plunger the lifts and supports the plunger and its tool out of operative position. The reciproating tool-carrying head 10 is operated by the usual well-known eccentric 28 acting on the eccentric block 29 that is mounted in the transverse way 29 in the tool-car ying head 10 which slides in the vertical ways 30 in the end of the overhanging arm.

in the end of the overhanging arm 2 the gag slide 25 is operated by a lever connection comprising a pin 31 working in a slot 32, and a lever that is pivoted at 34 to a frame which is provided .with an arc rack having notches 37, 88, 39 which are engaged by the latch 40 carried by the lever The tool seat 4 and die 7 are arranged in the stake beneath the punch 11, and the usual channel 41 is provided in the stake leading down from the die seat 4 to discharge the p-unchings therefrom. The seat 6 for the rivet setting anvil 9 is formed by a slot extending transversely of the stake 8; and the anvil 9 is fixed therein by cap screws 42 the heads of which are accommodated in the slot 6 and in recesses 43 at the ends of the anvil.

A vertical way as of greater diameter than the width of the anvil is provided extending downward from the slot in axial aline 16111, with the riveting tool 13; and an air pipe 4-5 is connected thereto to supply to the bottom thereof, compressed air from any suitable source as the compressed air pipe d6 controlled by the three-way valve d7 for supplying and exhausting air to and from said way 44 which forms a cylinder for the work supporting plunger 48 and the piston formed thereon at the lower end by the leather cup 49 fastened by washer a9 and cotter pin a on a pin 18 that projects down from the lower end of the plunger which has upward extensions or work-supporting parts 50 at the sides of the anvil 9. Said plunger is slotted at its end to form the anvil-accommodating slot 51 and the parts 50; and the anvil 9 projects through said slot and beyond the sides of the plunger and into the seat 6; and the slot 51 is of sufficient depth to allow the plunger to be moved up to cause the parts 50 to project above the anvil a requisite distance for supporting the Work at such a height as to allow the rivet b inserted in the work to hang freely above the anvil; and to allow the work to descend with the riveting tool during the riveting operation thereof.

From the foregoing it is seen that the single plunger 44 is in axial alinement with spring 1d of such plunthe riveting tool 13 and that this is made possible by providingthe plunger with the transverse slot 6 to accommodate the anvil 9. This is important for the reason that in former constructions employing two plungers, the plungers may not work at equal speeds and consequently are liable to crampand bind.

The pick 12 is constructed at its lower end as a prick punch having acentering point 52 and the prick die 8 which is provided with a cavity 53 centrally'located in opposition to the punch. Said cavity has a central depression 54:, the angle of which is more acute than the point of the prick, so as toaccomodate the fiowof metal from the prick punch.

The machine is provided with the usual clutch mechanism 55 to connect the beltdriven fly-wheel 56 with the eccentric shaft 57. Said clutch is controlled through the usual connections 58 to the pedal 59, so that the operator can throw the clutch to cause the head 10 to reciprocate when the work is in place. i

In practice the operator desiring to fasten together the joints 60, 61 of a well-casing section the joints of which have previously been rammed together, will bring the work into proper position beneath the punch 11 andwill adjust the lever 33 to cause the slide and its tooth 26 to depress the punch 11 into operative position and to release the other tools 12 and 13 so that they may be held out of operative position by their springs. The operator will then operate the pedal 59 to cause the hole to be punched. The casing section may then be adjusted to position for punching another hole and a series of holes may thus be successively punched. Then the operator will adjust the lever 83 to release the punch 11 and to throw the riveting tool 13 into operative position. Then the work will be shifted to bring one of the holes over the riveting die in the anvil and the operator will then manipulate the three-way valve a? to apply air to the cylinder 4L4, thus forcing up the work-supporting element 1-9 and its prongs 50, thereby lifting the work from the stake. Then a rivet b will beinserted into the hole from outside the casing,

and the pedal 59 again depressed to cause the head 10 to reciprocate, thereby operat ing the rivet set 13 to drive and set the rivet, the force of the'eccentric being suflicient to overcome the compressed air behind the plunger thereby to depress the work and the work-supporter as the rivet head is forced down by the rivet set 13. During this operation thehead ofthe rivet is firmly held against the top of the work and the force of the air pressure keeps the rivet in true position. Consequently,.the setting of the rivet is effected evenly and without canting the rivet, and the two thicknesses to be fastened together are firmly held between the rivet head and the work-supporter during the operation. When the rivet is fully set and the riveting punch 13 is withdrawn, the compressed air in the air pipe will force up the work support and the work thereon, so that the work can be brought into position for riveting another set. Usually the operator will punch a series of holes around the casing before beginning to insert and set the rivets and when a sufficient number of holes have been punched will move the work into position for setting the rivets and a series of rivets will usually be set in succession with one charge of air. After the series of rivets have been set the operator will manipulate the valve 4-7 to release the air from the cylinder and then if it is desired to pick the work, the lever 33 will be shifted to depress the pick 12 and release the other tools, and the workman will adjust the work by successive movements to bring'into position for the picking operation, those portions that are to be picked. The picking operation is effected by successively operating the pedal and adjusting the i work therefor until the two thicknesses are strongly interlocked by the operation of the pick; thus completing with comparative ease and at slight expense of time and labor, a well-casing not subject to the objections set forth. 7

I claim:

1. The combination with a stake having a vertical way therein, of an anvil carried by the stake and extending across the upper end of the way; a work-supporting element fitted in the way and provided with an axial for the latch to hold the tooth in various positions for holding the tools respectively 1n operative posltion.

3. A machine of the character described comprising a holder having a channel, a

plunger reciprocatably mounted in the holder and provided with a square head fit ting in the channel, means to move the plunger to brin the head against the bottom of the channel, means to operate the holder and a die in line with the tool.

4. A machine of the character described comprising a holder having a channel, a plunger reciprocatably mounted in the holder and provided with a tool and provided With a square head fitting in the channel, sail head having a beveled face, a wedge shape tooth having beveled face corresponding to and adapted to engage the beveled face of the head to move the plunger, means operate the tooth, means to operate the holder, and a die in line with the tool.

In combination, a head, a tool mounted in the head, a stake having a vertical Way forming a cylinder in axial alinenient with said tool, a work-supporting plunger in said Way formed with a slot at one end and formed With a single piston at the other end, an anvil projecting through said slot and having its ends seated in the stake, and means to supply fluid pressure medium to said vertical way.

6. A machine of the character described comprising a head, a holder detachably fastened to said head and provided in its upper end with a channel and provided With a vertical way communicating with said channel, a tool-holding plunger having a head to fit said channel anc provided with a shoulder in the vertical way, a coil spring surrounding the plunger, between said shoulder and the bottom of the vertical Way to force-the plunger upward in the holder, a die, and means to cause relative movement between the die and the plunger.

ln testimony whereof, I have hereunto set my hand at Los Angeles, California, this 1th day of June, 1912.

LESLIE A. IRVIN. In presence of JAMES R. Townsmzn, L. BELLE R1013.

Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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